Signal Processing Device and Medical Observation System

1. A signal processing device for being connected to a medical observation apparatus that performs examination on a subject and outputs a signal in accordance with a result of the examination, the signal processing device comprising: a plurality of internal modules configured to process the signal output from the medical observation apparatus, wherein the internal modules are connected via an interface supporting a communication protocol and having a connector geometry, at least the communication protocol or both communication protocol and connector geometry conforming to a communication interface standard, and any one of the internal modules is a relay module configured to convert the signal output from the medical observation apparatus into a signal conforming to the communication interface standard and output the converted signal to another internal module.

2. The signal processing device according to claim 1 , wherein any one of the internal modules is a control module including a main board on which a central processing unit is installed.

3. The signal processing device according to claim 1 , wherein any one of the internal modules is an image processing module configured to perform image processing.

4. The signal processing device according to claim 3 , wherein any one of the internal modules is a storage module configured to store therein a computer program for causing the image processing module to perform the image processing.

5. The signal processing device according to claim 1 , wherein any one of the internal modules is an image processing module configured to perform image processing, and the relay module is configured to perform image processing on behalf of the image processing module when a failure occurs in the image processing module.

6. The signal processing device according to claim 5 , wherein the image processing module is configured to perform the image processing by software processing, and the relay module is configured to perform the image processing by using a hardware configuration.

7. The signal processing device according to claim 1 , wherein any one of the internal modules is an image processing module configured to perform image processing, the internal modules are divided into a first group including the relay module and a second group including the image processing module, and the signal processing device includes a first outer housing configured to store therein the internal module of the first group, and a second outer housing that is configured separately from the first outer housing and that stores therein the internal module of the second group.

8. A medical observation system comprising: a medical observation apparatus configured to perform an examination on a subject and output a signal in accordance with a result of the examination; and a signal processing device connected to the medical observation apparatus, the signal processing device comprising a plurality of internal modules configured to process the signal output from the medical observation apparatus, wherein the internal modules are connected via an interface supporting a communication protocol and having a connector geometry, at least the communication protocol or both communication protocol and connector geometry conforming to a communication interface standard, and any one of the internal modules is a relay module configured to convert the signal output from the medical observation apparatus into a signal conforming to the communication interface standard and output the converted signal to another internal module.

9. The medical observation system according to claim 8 , wherein the medical observation apparatus includes an imaging unit that captures an image of the subject and outputs an imaging signal obtained by capturing the image as the signal output in accordance with the result of the examination.